I think i finally have my 3.0 slow figured out. I have fought this motor and all its efi and emission headaches since i bought the thing in 2007.
It had a blown head gasket and i replaced the gaskets and did a plug and wire and dist and timing belt and oil pump tune up.It would run fine some days and like crap some days.
My biggest problem was the engine shaking going down the road after the rebuild. The only code i would get was a code 25. I replaced coolant temp sensor, O2 and TPS and fuel pressure regulator.
I evan did the MaF sensor spring adjustment and the thing would vibrate your fillings out going down the road. It would only shake when you would be cruising and it would not shake under accel or decel.
I have taking the EGR and Air pair off and replaced every vacuum hose i could reach. I have taken the crossover off and put LCE headers and 2 1/4 pipes out the back with new muffler and cat converter.
After all that i've done, it still would shake and i would get a code 25 after only 10 miles of resetting the ECU.
I had decided i was going to do a complete engine rebuild and i started pulling the intake and timing belts to tear the motor down. I got as far as pulling the Injectors out and i got called out of town for work
so i stopped the teardown. I came back a few weekends later and i had decided to check the injectors out and i sent them off to Witch Hunters and they found the problems. They cleaned my injectors and fixed the
ones they could and replaced the bad one.I spent a couple of weekends putting every thing back together and when i fired it up for the first time you could tell it was a changed motor. Never owning a new 3.0,
I don't know what it was like new. This motor has some new life in it now. Two tanks of gas and no codes or shakes.
Thanks to all at this forum. I will update and keep ya'll posted as the miles rack up.

94yota4rnr

 

Subject should be 3.0 no longer slo. I thought you blew it up based on the subject.

 

Glad you got it all figured out!

 

excellent.
have used witch hunter before and will again.

for the money it is worth the peace of mind.....especially because of the PITA it is to get at the injectors.

 

I thought this was going to be a 1-uz swap thread